Miss Jennifer is 92. She has become increasing solitary, preferring her "quiet time" to the company of others. She no longer gets out much, and although she does not really seem depressed, her level of involvement with the world has diminished to almost nothing. Miss Jennifer's lifestyle is consistent with the aspect of disengagement theory known as:
a. antisocial personality.
b. discontinuity.
c. acceptance of these changes.
d. inactivity and rebellion.